A light beam shot through a blob of rubidium atoms can directly and reliably measure the size and orientation of a magnetic field, a team of physicists reports in the Sept. 13 Physical Review a.
9月13日，据一个物理学家小组在物理学评测A中的报道，一束光照射过一团铷原子就可以直接可靠地测量出一个磁场的大小和方向。
From the blade a blinding purple light exploded. It emitted a beam that shot across the ocean to Kalimdor, off the west coast.
紫光一闪，剑刃发出一道刺目的光芒越过海洋，飞向卡利姆多，消失在西面海岸的边际。
Suddenly, a beam of yellow light shot across the room. It searched the ground.
突然，一束黄光照进了房间，光线在地上寻找着。
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